Five Best Ideas of the Day
Published each weekday, at noon.
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Can free transit unlock economic benefits and support marginalized communities?
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The communication cables crisscrossing the sea floor can help detect earthquakes.
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This is what it's like to install a weather station at the top of the world.
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How stamping out sex trafficking online may have pushed it underground.
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These electric school buses will slash emissions and feed power back to the grid.